Core Viewpoint - The article highlights the successful development of a unique sports event in Jiande, Hangzhou, leveraging local water resources to attract swimming enthusiasts and boost tourism [1][8]. Group 1: Event Overview - The "Winter Swimming Challenge" in Jiande has evolved from a local tradition to a significant sporting event, with over 2,800 participants from 120 teams across 16 provinces [1][3]. - The event features swimming in the New Anjiang River, where water temperatures range from 14 to 17 degrees Celsius, providing a unique experience for participants [2][3]. Group 2: Safety Measures - Safety protocols include pre-event trials for participants, 30 rescue boats on the river, and 16 lifeguards stationed along the banks, ensuring participant safety during the event [6][5]. - Medical support is provided with four medical stations and 20 medical personnel on-site to address potential injuries or health issues [6]. Group 3: Brand Development - The event has been rebranded from "Endurance Warrior Challenge" to "Winter Swimming Challenge" to enhance its appeal and attract more participants [7]. - The event's visibility has increased significantly, with over 120 million views on social media, leading to a 73.3% increase in participants aged 20-40 compared to the previous year [7]. Group 4: Economic Impact - The event has positively impacted local tourism, with Jiande receiving 213,300 visitors during the event, a 12.5% increase year-on-year, and generating nearly 28 million yuan in tourism revenue, up 16% [8]. - The local government is promoting a broader range of extreme sports, including skydiving and mountain biking, to further enhance Jiande's reputation as a destination for extreme sports [8][9].